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Cells

TermDefinition
Epithelial Cells Found lining the surface of the body, body cavities and organs within.
Glandular Cells Responsible for producing some kind of secretion, e.g. mucus to lubricate the tissues.
Osteoblasts Produce bone tissue.
Erythrocytes (Red Blood Cells) Their C shape increases the surface area of the cell. Have no nucleus! Contain red pigment haemoglobin.
Nerve Cells or Neurons Slender arm like processes. Transmit electrical impulses through the nervous system to reach the whole body.
Muscle Capable of contracting to bring about body movement.
Cell Membrane Encloses the cytoplasm and controls the internal environment of the cell. All exchanges take place between the cell and its surrounding environment. Selectively permeable
Cytoplasm A jelly like material that contains all the structures and chemicals that make the cell function.
Organelles Free living structures within the cell other that the nucleus
Mitochondria Most important organelles in which the chemical reactions involved in cellular respiration take place. Energy is released for cellular function.
Rough Endoplasmic Reticulum Lined by ribosomes produced in the nucleus. Protein is synthesised here and the cell may transport it for use in the manufacture of digestive enzymes and hormones.
Smooth Endoplasmic Reticulum Not lined by ribosomes but is concerned with the synthesis and transport of lipids and steroids of body origin
Ribosomes Granules that are rich in ribonucleic acid, are sites of protein synthesis.
Cetrosome Lies near the nucleus and is made up of two centrioles. It is important during cell division and formation of the cilia and flagella.(slender projecting hairs needed by some cells.)
Lysomes Dark, round bodies containing enzymes responsible for splitting complex chemical compuonds into simpler ones. they also destroy worn out organelles within the cell.
Golgi body or complex A system of flattened tubes in which lysozymes are stored.
Nucleus To control all the functions of the cell and to hold the inheritable material in the form of chromosomes. Nucleus of the cell contain rod like objects called chromosomes. Only visible when the cell is about to divided into two during mitosis and meiosis.
Created by: laurenmclean511
 

 



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